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Pension and Other Post Retirement Benefits (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Sep. 27, 2012
Defined Benefit Plans [Member]
Jun. 28, 2012
Defined Benefit Plans [Member]
Jun. 27, 2013
Defined Benefit Plans [Member]
Jun. 28, 2012
Defined Benefit Plans [Member]
Jun. 27, 2013
Other Benefits [Member]
Jun. 28, 2012
Other Benefits [Member]
Jun. 27, 2013
Other Benefits [Member]
Jun. 28, 2012
Other Benefits [Member]
Jun. 27, 2013
U.K. pension plan [Member]
Jun. 27, 2013
Supplemental Executive Retirement Plan [Member]
Pension and Other Post-Retirement Benefits                    
Service cost $ 1.9 $ 1.7 $ 3.8 $ 3.3 $ 0.6 $ 0.9 $ 1.3 $ 1.7    
Interest cost 11.3 11.3 23.0 22.6 0.5 0.8 1.1 1.7    
Expected return on plan assets (21.0) (18.7) (42.3) (37.4)            
Amortization of net (gain)/loss 2.8 1.0 5.9 2.8   0.5   0.6    
Net periodic pension income (5.0) (4.7) (9.6) (8.7) 1.1 2.2 2.4 4.0    
Pension And Other Post Retirement Benefits Textuals [Abstract]                    
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Year                 4.2 1.4
Expected UK Pension Plan Contribution For The Year                 9.0  
UK Pension Plan Contributions Made Year To Date                 $ 4.8